CHACO CANYN NATL MON, NEW MEXICO

Period of Record General Climate Summary - Growing Degree Days

Station:(291647) CHACO CANYON NATL MON
From Year=1909 To Year=2011
Growing Degree Days for Selected Base Temperature (F)
Base	Jan.	Feb.	Mar.	Apr.	May	Jun.	Jul.	Aug.	Sep.	Oct.	Nov.	Dec.	Annual
40 M	5	17	84	258	527	800	1017	942	679	333	59	6	4728
40 S	5	22	106	364	892	1691	2708	3650	4330	4662	4722	4728	4728
45 M	0	2	27	140	376	650	862	787	530	198	17	1	3589
45 S	0	3	30	171	547	1196	2058	2845	3375	3572	3589	3589	3589
50 M	0	0	6	58	235	500	707	632	382	91	3	0	2613
50 S	0	0	6	64	299	799	1506	2138	2520	2611	2613	2613	2613
55 M	0	0	1	14	118	351	552	477	240	28	0	0	1781
55 S	0	0	1	14	133	484	1036	1513	1753	1781	1781	1781	1781
60 M	0	0	0	2	41	212	397	322	116	5	0	0	1095
60 S	0	0	0	2	43	255	652	974	1090	1095	1095	1095	1095

Corn Growing Degree Days
50 M	17	42	129	255	406	531	639	606	467	296	103	22	3513
50 S	17	58	188	442	848	1379	2018	2624	3092	3388	3491	3513	3513

M = Monthly Data
S - Running sum of monthly data.
Growing Degree Day units are computed as the difference between the daily average temperature and the base temperature. (Daily Ave. Temp. - Base Temp.) One unit is accumulated for each degree Fahrenheit the average temperature is above the base temperature. Negative numbers are discarded. Example: If the days high temperature was 95 and the low temperature was 51, the base 60 heating degree day units is ((95 + 51) / 2) - 60 = 13. This is done for each day of the month and summed.
Corn Growing Degree Day units have the limitations that the maximum daily temperatures greater than 86 F are set to 86 F and minimums less than 50 F are set to 50 F.
Table updated on Oct 31, 2012
Months with 5 or more missing days are not considered
Years with 1 or more missing months are not considered

Western Regional Climate Center, wrcc@dri.edu